The MSE-118 Quake is a powerful, horn-loaded subwoofer - the ultimate no-compromise solution for any application requiring crisp, deep bass information. The Quake, released in 2003, matches the utmost in modern drive unit performance with tireless research into horn technology. The result is one of the finest and most powerful professional subwoofers on the market today. The magnitude & phase response provided by the combination of the mighty 5” (127mm) voice coil 18” drive unit, coupled to a precisely engineered 9’ (2743mm) horn mean that Quakes will interface perfectly with any mid-high system, from point source to line arrays. Due to the way horns work, the Quake is best suited to use in groups - four or more Quakes in a stack will produce staggering results - producing higher SPL output than twice the number of many dual 18” designs. But it isn’t just about SPL - the impulse and phase response of the true horn system means it is unrivalled in terms of definition, speed and clarity. Quakes have been and continue to be used by the biggest artists and in the biggest venues all across the globe. The MSE-118 contains a single 5” (127mm) voice coil, 18” (457mm) LF drive unit, loaded onto a 9’ (2743mm) exponential/hyperbolic folded horn. Designed to be used in multiples, the MSE-118 is unmatched when used in blocks of four or more enclosures. With blocks of four or more, the system efficiency rises to approaching 50%, and as with all horn designs the more enclosures you have, the higher the efficiency becomes. The substantial enclosure is constructed from premium 18mm (3/4”) multi-laminate Birch plywood - rebated, screwed and glued together for maximum strength. The enclosure is sized at 574mm (22.6”) wide for optimum truck-pack - four enclosures will neatly fit across the width of standard vehicles in both Europe and the United States. The enclosure is supplied as standard in black textured paint, however RAL colour matching and weather protection options are available. The enclosure is fitted with eight steel bar handles and with interlocking feet on both sides to facilitate easy stacking. Heavy duty castors are also supplied for the rear of the enclosure, though these can be removed for fixed installations if required. A foam-backed hex-punched steel grille protects the front of the enclosure from damage and moisture ingress. The MSE-118 requires active high/low pass filters, and a single amplifier channel capable of delivering 1600-2000W RMS into an 8 ohm load. For optimal results, either the DQ20 Advanced System Amplifier, or the AD-9 amplifier combined with a DSC48 processor should be used.